The circadian clock rephases during lateral root organ initiation in Arabidopsis thaliana

Ute Voß, Michael H. Wilson, Kim Kenobi, Peter D. Gould, Fiona C. Robertson, Wendy A. Peer, Mikaël Lucas, Kamal Swarup, Ilda Casimiro, Tara J. Holman, Darren M. Wells, Benjamin Péret, Tatsuaki Goh, Hidehiro Fukaki, T. Charlie Hodgman, Laurent Laplaze, Karen J. Halliday, Karin Ljung, Angus S. Murphy, Anthony J. Hall, Alex A. R. Webb and Malcolm J. Bennett ()
Additional contact information
Ute Voß: Centre for Plant Integrative Biology, School of Biosciences, University of Nottingham, Sutton Bonington Campus, Sutton Bonington, Nottingham LE12 5RD, UK
Michael H. Wilson: Centre for Plant Integrative Biology, School of Biosciences, University of Nottingham, Sutton Bonington Campus, Sutton Bonington, Nottingham LE12 5RD, UK
Kim Kenobi: Centre for Plant Integrative Biology, School of Biosciences, University of Nottingham, Sutton Bonington Campus, Sutton Bonington, Nottingham LE12 5RD, UK
Peter D. Gould: Institute of Integrative Biology, University of Liverpool
Fiona C. Robertson: University of Cambridge
Wendy A. Peer: College of Agriculture & Natural Resources, University of Maryland
Mikaël Lucas: Centre for Plant Integrative Biology, School of Biosciences, University of Nottingham, Sutton Bonington Campus, Sutton Bonington, Nottingham LE12 5RD, UK
Kamal Swarup: Centre for Plant Integrative Biology, School of Biosciences, University of Nottingham, Sutton Bonington Campus, Sutton Bonington, Nottingham LE12 5RD, UK
Ilda Casimiro: Biología Celular Y Zoología, Facultad de Ciencias, Universidad de Extremadura
Tara J. Holman: Centre for Plant Integrative Biology, School of Biosciences, University of Nottingham, Sutton Bonington Campus, Sutton Bonington, Nottingham LE12 5RD, UK
Darren M. Wells: Centre for Plant Integrative Biology, School of Biosciences, University of Nottingham, Sutton Bonington Campus, Sutton Bonington, Nottingham LE12 5RD, UK
Benjamin Péret: Centre for Plant Integrative Biology, School of Biosciences, University of Nottingham, Sutton Bonington Campus, Sutton Bonington, Nottingham LE12 5RD, UK
Tatsuaki Goh: Centre for Plant Integrative Biology, School of Biosciences, University of Nottingham, Sutton Bonington Campus, Sutton Bonington, Nottingham LE12 5RD, UK
Hidehiro Fukaki: Graduate School of Science, Kobe University
T. Charlie Hodgman: Centre for Plant Integrative Biology, School of Biosciences, University of Nottingham, Sutton Bonington Campus, Sutton Bonington, Nottingham LE12 5RD, UK
Laurent Laplaze: Institut de Recherche pour le Développement, UMR DIADE
Karen J. Halliday: School of Biological Sciences, University of Edinburgh
Karin Ljung: Umea Plant Science Centre, Swedish University of Agricultural Sciences
Angus S. Murphy: University of Maryland
Anthony J. Hall: Institute of Integrative Biology, University of Liverpool
Alex A. R. Webb: University of Cambridge
Malcolm J. Bennett: Centre for Plant Integrative Biology, School of Biosciences, University of Nottingham, Sutton Bonington Campus, Sutton Bonington, Nottingham LE12 5RD, UK

Nature Communications, 2015, vol. 6, issue 1, 1-9

Abstract: Abstract The endogenous circadian clock enables organisms to adapt their growth and development to environmental changes. Here we describe how the circadian clock is employed to coordinate responses to the key signal auxin during lateral root (LR) emergence. In the model plant, Arabidopsis thaliana, LRs originate from a group of stem cells deep within the root, necessitating that new organs emerge through overlying root tissues. We report that the circadian clock is rephased during LR development. Metabolite and transcript profiling revealed that the circadian clock controls the levels of auxin and auxin-related genes including the auxin response repressor IAA14 and auxin oxidase AtDAO2. Plants lacking or overexpressing core clock components exhibit LR emergence defects. We conclude that the circadian clock acts to gate auxin signalling during LR development to facilitate organ emergence.

Date: 2015
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DOI: 10.1038/ncomms8641

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